Crushing disc of vertical impact mill

Abstract

The utility model discloses a vertical impact mill crushing disc which comprises a rack, a barrel is fixedly connected to one side of the top of the rack, a transmission device is installed at the bottom end in the barrel, a crushing disc is connected to the top of the transmission device, and a driving mechanism which is connected with the transmission device and drives the crushing disc to rotate is arranged on the rack. A plurality of hammer heads are fixedly installed on the outer wall of the smashing disc at equal intervals in the circumferential direction, a tooth-shaped stator lining plate is fixedly connected to the position, corresponding to the smashing disc, of the inner wall of the barrel, and an air inlet is formed in the position, below the smashing disc, of the barrel. When the crushing disc rotates at a high speed, radial eddy current is not generated any more, circulation of fine powder particles in a crushing area is eliminated, over-crushing is avoided, the distribution width of the particle size of a product is narrowed, meanwhile, abrasion of the top face of the crushing disc is reduced, and the service life of the crushing disc is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of pulverizing equipment, in particular to a vertical impact mill pulverizing disc. Background Art

[0002] The vertical impact mill currently used for dry ultrafine grinding of solid materials includes a frame, an air inlet, a transmission device, a guide cover, a crushing disc, a toothed stator liner, a feed port, a cylinder and a classification device. The hammer head b is fixed at equal distances around the top surface of the crushing disc a. The hammer head b and the toothed stator liner form a crushing pair. The material is added to the upper part of the crushing disc in the cylinder through the feed port. The crushing disc rotates at high speed under the drive of the drive device and is thrown to the crushing pair under the action of centrifugal force to be crushed. The air flow enters the mill from the air inlet and rises from the gap between the hammer head and the toothed stator liner. The material crushed to a certain fineness moves with the rising air flow to the classification area for classification. The qualified fine powder passes through the classification device and is discharged from the discharge port of the classification device. The coarse powder is thrown to the cylinder wall and stalls and falls back to the crushing area to continue crushing.

[0003] During operation, the crushing disk a rotates at high speed, and a pressure difference is generated between the head c (outer end in the radial direction) and the tail d (inner end in the radial direction) of the hammer b. The pressure of the tail d is lower than that of the head c, which will produce the following pressure at the hammer head: Figure 6 The radial local vortex shown is beneficial to the cyclic crushing of materials in the crushing zone. However, due to their large inertia, large particles will rise a distance and then fall down to continue to be crushed. Fine particles have a stronger ability to follow the airflow, and some fine powder will continue to be circulated and crushed under the drive of the circulating airflow, thus causing over-crushing, which reduces the grinding efficiency of the mill and widens the product particle size distribution. Moreover, while the material particles circulate radially, they are also affected by the tangential force and friction generated by the rotation of the crushing disk. The material particles will slide on the tail of the hammer head on the crushing disk, causing the crushing disk to wear at this location, resulting in the crushing disk being scrapped prematurely due to wear. Therefore, it is necessary to design a vertical impact mill crushing disk to solve the problems in the above-mentioned background technology. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a horizontal impact mill pulverizing disk, which is installed on the circumference of the conical surface of the pulverizing disk through a hammer head. The top surface of the pulverizing disk has no additional protrusions. When the pulverizing disk rotates at high speed, radial eddy currents are no longer generated, eliminating the circulation of fine powder particles in the pulverizing zone, avoiding over-pulverization, narrowing the width of the product particle size distribution, and reducing the wear of the top surface of the pulverizing disk, thereby extending the service life of the pulverizing disk.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A vertical impact mill pulverizing disc comprises a frame, a cylinder fixedly connected to one side of the top of the frame, a transmission device installed at the bottom end of the cylinder, a pulverizing disc connected to the top of the transmission device, a driving mechanism connected to the transmission device to drive the pulverizing disc to rotate is provided on the frame, a plurality of hammer heads are fixedly installed on the outer wall of the pulverizing disc at equal intervals in the circumferential direction, a toothed stator liner is fixedly connected to the inner wall of the cylinder corresponding to the pulverizing disc, an air inlet is provided on the cylinder below the pulverizing disc, a feeding port is provided on the cylinder above the pulverizing disc, and a grading device is installed on the top of the cylinder.

[0007] Preferably, the pulverizing disk is a frustum-shaped structure, and the diameter of the pulverizing disk gradually increases from top to bottom.

[0008] Preferably, mounting grooves are provided on the outer circumferential wall of the crushing disk at locations corresponding to the hammer heads, mounting holes are provided in the mounting grooves, countersunk holes are provided on the hammer heads at locations corresponding to the mounting holes, and the hammer heads are installed in the mounting grooves and are connected and fixed to the crushing disk by bolts passing through the countersunk holes and the mounting holes.

[0009] Preferably, the working surface of the hammer head is L-shaped, and a lower section of the hammer head is a straight edge section parallel to the toothed stator liner.

[0010] Preferably, the hammer head and the toothed stator liner form a crushing pair to form an air flow channel with a Y-shaped cross section.

[0011] Preferably, the driving mechanism includes a passive pulley fixedly connected to the bottom of the transmission device, a main drive motor mounted on the frame, and a driving pulley fixedly connected to the output end of the main drive motor, and a belt is connected between the driving pulley and the passive pulley.

[0012] Preferably, the grading device is provided with a discharge port.

[0013] Preferably, a flow guide cover is fixedly connected to the interior of the cylinder below the pulverizing disk.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The utility model discloses a hammer head is installed on the circumference of the conical surface of the crushing disk, and the top surface of the crushing disk has no additional protrusions. When the crushing disk rotates at a high speed, no radial vortex is generated, the circulation of fine powder particles in the crushing area is eliminated, over-crushing is avoided, the width of the product particle size distribution is narrowed, and at the same time, the wear of the top surface of the crushing disk is reduced, and the service life of the crushing disk is extended; when the hammer head and the toothed stator liner form a crushing pair, an air flow channel with a Y-shaped cross section is formed, and when the rising air flow passes through the gap between the hammer head and the toothed stator liner, the air flow is decelerated, and the rising air flow only carries the fine powder particles that are close to the qualified level to the classification device for classification, and the coarse powder remains in the crushing area for further crushing, and compared with the prior art, finer coarse particles will remain in the crushing area for further crushing, thereby improving the crushing efficiency; the lower section of the hammer head is a straight edge section parallel to the toothed stator liner, and a small gap is formed between the hammer head and the toothed stator liner, so that strong shearing is generated when the crushing disk rotates at a high speed, which is beneficial to the crushing of fibrous materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the vertical impact mill pulverizing disc;

[0017] Figure 2 This is a structural diagram of the combination of the crushing disc, hammer head and toothed stator liner;

[0018] Figure 3 This is a schematic diagram of the main structure of the crushing disk;

[0019] Figure 4 This is a schematic diagram of the crushing disk structure from a top view;

[0020] Figure 5 Schematic diagram of hammer head structure;

[0021] Figure 6 It is a structural diagram of the combination of a crushing disk, a hammer head and a toothed stator liner in the prior art.

[0022] In the figure: 1. Frame; 2. Air inlet; 3. Transmission device; 31. Main drive motor; 32. Active pulley; 33. Passive pulley; 4. Air guide cover; 5. Crushing disc; 51. Mounting groove; 52. Hammer head; 6. Toothed stator liner; 7. Feeding port; 8. Cylinder; 9. Classifying device; 91. Discharge port. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Example

[0024] See also Figure 1-Figure 5 This embodiment provides a vertical impact mill pulverizing disk, including a frame 1, a cylinder 8 fixedly connected to one side of the top of the frame 1, a transmission device 3 installed at the bottom end of the cylinder 8, a pulverizing disk 5 connected to the top of the transmission device 3, a driving mechanism connected to the transmission device 3 to drive the pulverizing disk 5 to rotate is provided on the frame 1, a plurality of hammer heads 52 are fixedly installed on the outer wall of the pulverizing disk 5 at equal intervals in the circumferential direction, a toothed stator liner 6 is fixedly connected to the inner wall of the cylinder 8 corresponding to the pulverizing disk 5, an air inlet 2 is provided on the cylinder 8 below the pulverizing disk 5, and a feeding port 7 is provided on the cylinder 8 above the pulverizing disk 5. A grading device 9 is installed on the top of the cylinder 8, and a discharge port 91 is provided on the grading device 9. The material to be crushed is put into the cylinder 8 through the feeding port 7, and the crushing disk 5 is driven to rotate by the driving mechanism and the transmission device 3. The hammer head 52 on the crushing disk 5 and the toothed stator liner 6 form a crushing side effect to crush the material to be crushed. The air inlet 2 introduces air into the cylinder 8 to form an airflow. The material crushed to a certain fineness moves to the grading device 9 with the rising airflow for classification. Qualified fine powder passes through the grading device 9 and is discharged from the discharge port 91. The coarse powder is thrown to the wall of the cylinder 8 and stalls and then falls back to the crushing pair to continue crushing.

[0025] In this embodiment, the crushing disk 5 is a truncated cone structure. The diameter of the crushing disk 5 gradually increases from top to bottom. The working surface of the hammer head 52 is L-shaped. The hammer head 52 is installed on the circumference of the conical surface of the crushing disk 5. The top surface of the crushing disk 5 has no additional protrusions. When the crushing disk 5 rotates at high speed, radial eddy currents are no longer generated, eliminating the circulation of fine powder particles in the crushing area, avoiding over-crushing, narrowing the width of the product particle size distribution, and reducing the wear of the top surface of the crushing disk, thereby extending the service life of the crushing disk. When the hammer head 52 and the toothed stator liner 6 form a crushing pair, a Y-shaped cross section is formed. The air flow passage is designed so that when the rising air flow passes through the gap between the hammer head 52 and the toothed stator liner 6, the air flow slows down, and the rising air flow only carries the fine powder particles that are close to the qualified level to the classification device 9 for classification, and the coarse powder remains in the crushing area to continue to be crushed. Moreover, compared with the prior art, finer coarse particles will remain in the crushing area to continue to be crushed, thereby improving the crushing efficiency. The lower section of the hammer head 52 is a straight edge section parallel to the toothed stator liner 6, and a small gap is formed between the hammer head 52 and the toothed stator liner 6. When the crushing disk rotates at high speed, strong shearing is generated, which is beneficial to the crushing of fibrous materials.

[0026] In this embodiment, if Figure 3 、 Figure 4 and Figure 5As shown, mounting grooves 51 are provided on the outer circumferential wall of the crushing disk 5 at locations corresponding to the hammer heads 52, mounting holes are provided in the mounting grooves 51, and countersunk holes are provided on the hammer heads 52 at locations corresponding to the mounting holes. The hammer heads 52 are installed in the mounting grooves 51 and are connected and fixed to the crushing disk 5 by bolts passing through the countersunk holes and the mounting holes. A positioning area for the hammer head 52 is formed by the mounting grooves 51, and the hammer head 52 is installed in the mounting grooves 51, which facilitates the installation, positioning and tightening of the hammer head 52. The bolt connection facilitates the disassembly and assembly of the hammer head 52 and the crushing disk 5, thereby facilitating the replacement of the hammer head 52.

[0027] In this embodiment, if Figure 1 As shown, the driving mechanism includes a passive pulley 33 fixedly connected to the bottom of the transmission device 3, a main driving motor 31 installed on the frame 1, and a driving pulley 32 fixedly connected to the output end of the main driving motor 31. A belt is connected between the driving pulley 32 and the passive pulley 33. The main driving motor 31 drives the driving pulley 32 to rotate, and the driven pulley 33 is driven to rotate under the action of the belt, thereby driving the crushing disk 5 connected to the transmission device 3 to rotate, thereby crushing the material.

[0028] In this embodiment, if Figure 1 As shown, a guide cover 4 is fixedly connected to the interior of the cylinder 8 below the pulverizing disk 5 to guide the wind entering from the air inlet 2 to form an upward airflow between the air flow channels.

[0029] Working principle: When in use, the material to be crushed is put into the cylinder 8 through the feeding port 7, and the main driving motor 31 drives the active pulley 32 to rotate, and the driven pulley 33 is driven to rotate under the action of the belt, thereby driving the crushing disk 5 connected to the transmission device 3 to rotate, and the hammer head 52 on the crushing disk 5 and the toothed stator liner 6 form a crushing side effect to crush the material to be crushed. The air inlet 2 enters the cylinder 8 to form an airflow, and is installed on the circumference of the conical surface of the crushing disk 5 through the hammer head 52. The top surface of the crushing disk 5 has no additional protrusions. When the crushing disk 5 rotates at high speed, no radial vortex is generated, which eliminates the circulation of fine powder particles in the crushing area, avoids over-crushing, narrows the width of the product particle size distribution, and reduces the top surface of the crushing disk. Wear is reduced, and the service life of the crushing disk is extended. When the hammer head 52 and the toothed stator liner 6 form a crushing pair, an air flow channel with a Y-shaped cross section is formed. When the rising air flow passes through the gap between the hammer head 52 and the toothed stator liner 6, the air flow slows down. The rising air flow only carries the fine powder particles that are close to qualified to the grading device 9 for classification, and the coarse powder remains in the crushing area to continue to be crushed. Compared with the existing technology, there will be finer coarse particles remaining in the crushing area to continue to be crushed, which improves the crushing efficiency. The lower section of the hammer head 52 is a straight edge section parallel to the toothed stator liner 6, and a small gap is formed between the toothed stator liner 6. When the crushing disk rotates at high speed, strong shearing is generated, which is beneficial to the crushing of fibrous materials and improves the crushing effect of the material.

[0030] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of protection of the present invention.

Claims

1. A vertical impact mill pulverizing disc, comprising a frame (1), characterized in that: A cylinder (8) is fixedly connected to one side of the top of the frame (1), a transmission device (3) is installed at the bottom end of the cylinder (8), a crushing disc (5) is connected to the top of the transmission device (3), a driving mechanism connected to the transmission device (3) is provided on the frame (1) for driving the crushing disc (5) to rotate, a plurality of hammer heads (52) are fixedly installed at equal intervals along the circumferential direction on the outer wall of the crushing disc (5), a toothed stator liner (6) is fixedly connected to the inner wall of the cylinder (8) corresponding to the crushing disc (5), an air inlet (2) is provided on the cylinder (8) below the crushing disc (5), a feeding port (7) is provided on the cylinder (8) above the crushing disc (5), and a grading device (9) is installed on the top of the cylinder (8).

2. The vertical impact mill pulverizing disc according to claim 1, characterized in that: The pulverizing disk (5) is a truncated cone-shaped structure, and the diameter of the pulverizing disk (5) gradually increases from top to bottom.

3. The vertical impact mill pulverizing disc according to claim 2, characterized in that: Mounting grooves (51) are provided on the outer circumferential wall of the pulverizing disk (5) at locations corresponding to the hammer heads (52), mounting holes are provided in the mounting grooves (51), and countersunk holes are provided on the hammer heads (52) at locations corresponding to the mounting holes. The hammer heads (52) are installed in the mounting grooves (51) and are connected and fixed to the pulverizing disk (5) by bolts passing through the countersunk holes and the mounting holes.

4. The vertical impact mill pulverizing disc according to claim 3, characterized in that: The working surface of the hammer head (52) is L-shaped, and a lower section of the hammer head (52) is a straight edge section parallel to the toothed stator liner (6).

5. The vertical impact mill pulverizing disc according to claim 4, characterized in that: When the hammer head (52) and the toothed stator liner (6) form a crushing pair, an air flow channel with a Y-shaped cross section is formed.

6. The vertical impact mill pulverizing disc according to claim 1, characterized in that: The driving mechanism comprises a passive pulley (33) fixedly connected to the bottom of the transmission device (3), a main driving motor (31) mounted on the frame (1), and a driving pulley (32) fixedly connected to the output end of the main driving motor (31), wherein a belt is connected between the driving pulley (32) and the passive pulley (33).

7. The vertical impact mill pulverizing disc according to claim 1, characterized in that: The grading device (9) is provided with a discharge port (91).

8. The vertical impact mill pulverizing disc according to claim 1, characterized in that: A flow guide cover (4) is fixedly connected to the interior of the cylinder (8) below the pulverizing disc (5).

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